package com.qd.system.service.article;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.cdqidi.constant.ConstantDto;
import com.cdqidi.db.BaseService;
import com.cdqidi.dto.CacheKey;
import com.cdqidi.exception.ApiException;
import com.cdqidi.util.RedisTemplateUtil;
import com.qd.common.sys.domain.entity.article.ArticleContentDTO;
import com.qd.system.mapper.ArticleContentMapper;
import com.qd.system.model.ArticleContent;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Optional;

import static java.util.stream.Collectors.toList;

/**
 * 内容详情
 *
 * @author sjk
 */
@RequiredArgsConstructor
@Service
@Slf4j
public class ArticleContentService extends BaseService<ArticleContentMapper, ArticleContent> {

    private static final String PREFIX_ID = "sys_article_content_articleId_{0}";

    private final RedisTemplateUtil<ArticleContent> redisTemplateUtil;

    /**
     * 保存
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public ArticleContentDTO save(ArticleContentDTO dto) {
        final ArticleContent model = dtoToModel(dto);
        try {
            if (super.save(model)) {
                return modelToDto(model);
            }
            throw new ApiException("添加失败");
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 修改
     *
     * @param dto 页面对象
     * @return 页面对象
     */
    @Transactional(rollbackFor = Exception.class)
    public ArticleContentDTO update(ArticleContentDTO dto) {
        final ArticleContent historyModel = Optional.ofNullable(getById(dto.getArticleId())).orElseThrow(() -> new ApiException("ID不存在,不能更新"));
        final ArticleContent model = dtoToModel(dto);
        try {
            if (super.updateById(model)) {
                return modelToDto(model);
            }
            throw new ApiException("更新失败");
        } finally {
            clearCache(historyModel);
            historyModel.freeData();
            model.freeData();
        }

    }

    /**
     * 删除，单个
     *
     * @param articleId 主键
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeById(String articleId) {
        final ArticleContent model = getById(articleId);
        if (null == model) {
            throw new ApiException("数据不存在,不能删除");
        }
        try {
            if (!super.removeById(articleId)) {
                throw new ApiException("删除失败");
            }
        } finally {
            clearCache(model);
            model.freeData();
        }
    }

    /**
     * 批量删除
     *
     * @param ids 主键集合
     */
    @Transactional(rollbackFor = Exception.class)
    public void removeBatchIds(List<String> ids) {
        List<ArticleContent> historyModelList = checkIds(ids);
        try {
            if (!super.removeByIds(ids)) {
                throw new ApiException("批量删除失败");
            }
        } finally {
            clearCaches(historyModelList);
            historyModelList.clear();
        }
    }

    /**
     * 根据传入对象构建查询参数，判断是否存在
     *
     * @param dto 参数
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExists(ArticleContentDTO dto) {
        final QueryWrapper<ArticleContent> queryWrapper = createQueryWrapper(dto);
        final boolean exists = super.count(queryWrapper) > 0;
        queryWrapper.clear();
        return exists;
    }

    /**
     * 根据主键判断数据是否存在
     *
     * @param articleId 主键
     * @return 存在为true
     */
    @Transactional(readOnly = true)
    public Boolean isExistsById(String articleId) {
        boolean exists = false;
        if (StringUtils.hasLength(articleId)) {
            final ArticleContent model = getById(articleId);
            exists = (null != model);
            if (exists) {
                model.freeData();
            }
        }
        return exists;
    }

    /**
     * 根据主键获取数据
     *
     * @param articleId 主键
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public ArticleContent getById(String articleId) {
        final String key = RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, articleId);
        return redisTemplateUtil.get(new CacheKey().setKey(key).setTimeout(ConstantDto.REDIS_TIME_OUT_DAY), () -> super.getById(articleId), ArticleContent.class);
    }

    /**
     * 根据主键获取数据
     *
     * @param articleId 主键
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public ArticleContentDTO getByIdDto(String articleId) {
        final ArticleContent model = getById(articleId);
        if (null != model) {
            return modelToDto(model);
        }
        return null;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录
     */
    @Transactional(readOnly = true)
    public ArticleContent getOne(ArticleContentDTO dto) {
        final QueryWrapper<ArticleContent> queryWrapper = createQueryWrapper(dto);
        ArticleContent model = super.getOne(queryWrapper);
        queryWrapper.clear();
        return model;
    }

    /**
     * 根据条件查询单条数据
     *
     * @param dto 查询参数
     * @return 单条记录，转换成页面对象
     */
    @Transactional(readOnly = true)
    public ArticleContentDTO getOneDto(ArticleContentDTO dto) {
        final ArticleContent model = getOne(dto);
        if (null == model) {
            return null;
        }
        final ArticleContentDTO newDto = modelToDto(model);
        model.freeData();
        return newDto;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据
     */
    @Transactional(readOnly = true)
    public List<ArticleContent> getList(ArticleContentDTO dto) {
        final QueryWrapper<ArticleContent> queryWrapper = createQueryWrapper(dto);
        final List<ArticleContent> list = super.list(queryWrapper);
        queryWrapper.clear();
        return list;
    }

    /**
     * 根据条件查询列表数据
     *
     * @param dto 查询参数
     * @return 列表数据，转换成页面对象
     */
    @Transactional(readOnly = true)
    public List<ArticleContentDTO> getListDto(ArticleContentDTO dto) {
        return modelToDtoList(getList(dto));
    }

    /**
     * 清空缓存
     *
     * @param model 数据库对象
     */
    public void clearCache(ArticleContent model) {
        if (null == model) {
            return;
        }
        redisTemplateUtil.deleteByKey(RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getArticleId()));
    }

    /**
     * 批量清空缓存
     *
     * @param list 数据库对象
     */
    public void clearCaches(List<ArticleContent> list) {
        if (null == list || list.isEmpty()) {
            return;
        }
        List<String> ids = list.stream().map(model -> RedisTemplateUtil.getRedisCacheKey(PREFIX_ID, model.getArticleId())).collect(toList());
        if (!ids.isEmpty()) {
            redisTemplateUtil.deleteByKey(ids);
            ids.clear();
        }
    }

    /**
     * 数据库对象转页面对象
     *
     * @param model 数据库对象
     * @return 页面对象
     */
    public ArticleContentDTO modelToDto(ArticleContent model) {
        if (null == model) {
            return null;
        }
        final ArticleContentDTO dto = new ArticleContentDTO();
        dto.setArticleId(model.getArticleId());
        dto.setContent(model.getContent());
        return dto;
    }

    /**
     * 页面对象转数据库对象
     *
     * @param dto 页面对象
     * @return 数据库对象
     */
    public ArticleContent dtoToModel(ArticleContentDTO dto) {
        if (null == dto) {
            return null;
        }
        final ArticleContent model = new ArticleContent();
        model.setArticleId(dto.getArticleId());
        model.setContent(dto.getContent());
        return model;
    }

    /**
     * 数据库对象转页面对象
     *
     * @param list 数据库对象
     * @return 页面对象
     */
    public List<ArticleContentDTO> modelToDtoList(List<ArticleContent> list) {
        if (null == list) {
            return Collections.emptyList();
        }
        return list.stream().map(this::modelToDto).collect(toList());
    }

    /**
     * 页面对象转数据库对象
     *
     * @param list 页面对象
     * @return 数据库对象
     */
    public List<ArticleContent> dtoToModelList(List<ArticleContentDTO> list) {
        if (null == list) {
            return Collections.emptyList();
        }
        return list.stream().map(this::dtoToModel).collect(toList());
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto 查询参数，不为空的属性会被自动加入
     */
    public QueryWrapper<ArticleContent> createQueryWrapper(ArticleContentDTO dto) {
        return createQueryWrapper(dto, "");
    }

    /**
     * 拼装查询参数，除了主键的其他字段会自动加入进来
     *
     * @param dto        查询参数，不为空的属性会被自动加入
     * @param tableAlias 表别名
     */
    public QueryWrapper<ArticleContent> createQueryWrapper(ArticleContentDTO dto, String tableAlias) {
        final QueryWrapper<ArticleContent> queryWrapper = new QueryWrapper<>();
        if (null != dto) {
            if (StringUtils.hasLength(tableAlias) && tableAlias.charAt(tableAlias.length() - 1) != '.') {
                tableAlias += ".";
            }
            if (StringUtils.hasLength(dto.getContent())) {
                queryWrapper.eq(tableAlias + "content", dto.getContent());
            }
        }
        return queryWrapper;
    }

    /**
     * 批量检查主键在数据库中是否存在
     *
     * @param ids 主键集合
     * @return 主键查询出来的集合
     */
    public List<ArticleContent> checkIds(List<String> ids) {
        if (null == ids || ids.isEmpty()) {
            throw new ApiException("ids不能为空");
        }
        final List<ArticleContent> list = super.listByIds(ids);
        if (list.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(ids.toArray()));
        }
        if (ids.size() == list.size()) {
            return list;
        }
        List<String> dbIds = list.stream().map(ArticleContent::getArticleId).collect(toList());
        final List<String> notExistsList = ids.stream().filter(id -> !dbIds.contains(id)).collect(toList());
        dbIds.clear();
        if (!notExistsList.isEmpty()) {
            throw new ApiException("ids不存在" + Arrays.toString(notExistsList.toArray()));
        }
        return list;
    }

}